Hoisting apparatus.



No. 7|4Jo2. Patent'd 'Dec. 2, I902. c; w. HUNT.

HO'ISTING APPARATUS.

(Application filed Mar. 28, 1902.)

(No Model.)

UNITED STATES CHARLES WALLACE HUNT, OF WEST NEW BRIGHTON, NEWYORK.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 714,702, dated December 2, 1902.

Application filed March 28,1902.

T0 at whom it may concern:

Be it known that I, CHARLES WALLACE HUNT, a citizen of the United States, residing in West New Brighton, borough ofRichmond, city of New York, State of New York, have invented certain new and useful Improvements in Hoisting Apparatus, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

In another application, Serial No. 99,391, filed March 22, 1902, are disclosed means whereby in hoisting apparatus in which two ropes are connected to the load and share in sustaining it. the guides over which such ropes respectively pass from the load toor toward their respective controlling drums are caused to separate more or less, according to the position of the load, and through their separation to overcome the tendency of the load to rotate. In that application,wherein it is intended to cover the invention in its broadest aspect, the two guides are shown as connected, respectively, by ropes to drums of different sizes, the change in the relative positions of the two drums being brought about in the embodiment of the invention chosen in that case for illustration and explanation by taking in or paying out such two ropes at different rates of speed, so that the two guides separate or approach each other as they move in or out upon their supports. It is not essential to the practice of the broad invention that the guides shall be connected, respectively, to corresponding drums, and it is the object of this invention to provide means whereby the change in the relative positions of the two guides can be effected without requiring a separate winding-drum for each guide. In the present case a single windingdrum is provided for controlling or effecting the translation of the load and the two guides are connected to said single drum by an evener which permits change in the relative positions of the guides in response to varying stresses of the two hoisting-ropes.

The invention will be more fully described hereinafter with reference to the accompanying drawings, in which for purposes of explanation it is represented as embodied in acon- SerialNo,100,4=06. (No model.)

view showing the separable trolleys and the parts immediately associated therewith. Fig. 3 is a side view of the parts shown in Fig. 2, the trolleys being separated.

In the embodiment of the invention represented in the drawings the two hoisting ropes or the hoisting-rope f and the shovel opening and closing rope g, which also shares in sustaining the load, are connected, respectively, to the Winding-drums a and b, which may be driven by motors of any suitable character, but preferably of different horsepower. A track or cable or other support 6 sustains the movable guides or trolleys h and t', over which the ropes f and g are guided, respectively. As set forth in the application above referred to, the movable guides or trolleys are arranged to have relative movement during the movement of the load, and such movement may be provided for in any conven ient manner. As represented in the drawings, however, each guide It and 'i is mounted upon the corresponding axle h t", which receives the wheels h t forthe support of the trolley on the track. Collars h on the shaft or axle h furnish points of attachment for the reach or guide arm 70, which maybe conven iently formed as a bow-iron, as represented in Fig. 2. Collars t on the shaft t" likewise furnish points of support for asimilar but shorter bow-iron l and may also be provided with guides 2 through which pass the limbs of the bow-iron la. The two bow-irons hand Zare not attached to separate winding ropes, as in the construction described in the application above referred to, but are attached through the medium of an evener to asingle winding rope. It will be obvious that the evener may be arranged in different ways. As shown in the drawings, it comprises a short line m, which is passed around a sheave m, secured to the end of the winding rope n, the short line m having its ends secured to the bowirons 7c and Z, respectively. The rope rn passes tendency of the load to twist.

over a guide-sheave n at the outer end of the trolley-support and thence to a winding-drum M, which may be equipped with a brake n and arranged to bedriven from its shaft 0 through a clutch, which is indicated at 10.

It will be obvious that the movement of the two movable guides or trolleys h and 1) together will be effected or controlled by the drum n and rope n and that the relative movement of one trolley with respect to the other will depend upon the relative inward stresses applied to the two movable guides or trolleys, respectively, through the ropes f and g, which pass over them. Thus if more pull isexerted by the hoisting-rope fduring the raising of the load from its initial point than upon the opening and closing rope g the greater stress on the innermost trolley it will cause the trolley h to move inward, drawing the outer trolley '11 outward through the operation of the evener, whereby the trolleys will be separated sufficiently to overcome the As the load is raised and the pull on the two hoisting-ropes is equalized or properly regulated the two trolleys will approach each other and will move inward together as the rope'n is paid out by the drum n At the point where the load isito be discharged the two trolleys will stand close together, so that the discharging of the load can be properly accomplished. As

will be understood, the excess of pull on the rope g at the time of opening or closing the bucket will hold the trolleys close together, since the rope 9 passes over the outermost trolley.

Various changes in details, construction, and arrangement will suggest themselves in the adaptation of the present improvement to different specific uses, and it is to be understood, therefore, that the invention is not to be restricted to the particular construction and arrangement of parts shown and described herein.

I claim as my invention 1. In ahoisting apparatus, the combination of hoisting-ropes, separable guides for said ropes respectively, an evener to which said guides are connected, and a single winding rope connected to said evener.

2. In a hoisting apparatus, the combination of hoisting-ropes, separable guides for said ropes respectively, a winding rope, a sheave carried by said winding rope, anda short line passed over said sheave and having its ends connected to said guides respectively.

This specification signed and witnessed this 18th day of-March, A. D. 1902.

CHARLES WALLACE HUNT.

In presence of- C. 0. KING, W. B. GREELEY. 

